diff --git a/include/ruby/3/core/rtypeddata.h b/include/ruby/3/core/rtypeddata.h
index 1627d327f9..21b08570fe 100644
--- a/include/ruby/3/core/rtypeddata.h
+++ b/include/ruby/3/core/rtypeddata.h
@@ -160,7 +160,7 @@ RTYPEDDATA_TYPE(VALUE obj)
 #if ! RUBY_NDEBUG
     if (RB_UNLIKELY(! RTYPEDDATA_P(obj))) {
         rb_unexpected_type(obj, RUBY_T_DATA);
-# if ! defined(__sun)
+# if ! defined(__sun) && ! RUBY3_COMPILER_IS(Intel)
         RUBY3_UNREACHABLE_RETURN(NULL);
 # endif
     }
diff --git a/include/ruby/3/memory.h b/include/ruby/3/memory.h
index 18ed1d81cb..4e9741eee5 100644
--- a/include/ruby/3/memory.h
+++ b/include/ruby/3/memory.h
@@ -253,7 +253,7 @@ ruby3_size_mul_or_raise(size_t x, size_t y)
     }
     else {
         ruby_malloc_size_overflow(x, y);
-# if ! defined(__sun)
+# if ! defined(__sun) && ! RUBY3_COMPILER_IS(Intel)
         RUBY3_UNREACHABLE_RETURN(0);
 # endif
     }